The $1,000,000.00 in blackmail money would be the equivalent of about $8,400,000.00 in the year 2021.
The Badger Game is an extortion scheme in which the victim is tricked into a compromising position to make them vulnerable to blackmail.
Leon Ames is made up and costumed to resemble Colonel Sanders of Kentucky Fried Chicken fame; at one point, Jed tells him that Granny's possum is "finger-lickin' good."
Jethro's "extravagant" allowance is 50 cents a week. In 2021, that would be just over four dollars; in either year, it would take him a full month to save enough money for a movie ticket.
The set used for Emaline/Rita's bedroom in the Clampett Mansion has also been used as Drysdale's bedroom.